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            <header_release>2021-10-27</header_release>
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            <update>2025-07-09</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>La Caixa Foundation</funding_body>
                <code>LCF/PR/HR20/52400017</code>
            </grant_reference>
            <grant_reference>
                <funding_body>Ministry of Economy and Competitiveness (MINECO)</funding_body>
                <code>SAF2015-64869-R-FEDER</code>
            </grant_reference>
            <grant_reference>
                <funding_body>Ministry of Economy and Competitiveness (MINECO)</funding_body>
                <code>RTI2018-094211-B-100-FEDER</code>
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                <funding_body>Ministry of Economy and Competitiveness (MINECO)</funding_body>
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        <title>Human LAT2-4F2hc complex in the apo-state</title>
        <authors_list>
            <author>Rodriguez CF</author>
            <author>Escudero-Bravo P</author>
        </authors_list>
        <keywords>HATs, amino-acid, transporter, membrane, protein, heterodimer, MEMBRANE PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-9166-0132" order="1">Rodriguez CF</author>
                    <author order="2">Escudero-Bravo P</author>
                    <author ORCID="0000-0001-8850-2571" order="3">Diaz L</author>
                    <author order="4">Bartoccioni P</author>
                    <author ORCID="0000-0003-4132-9307" order="5">Garcia-Martin C</author>
                    <author order="6">Gilabert JG</author>
                    <author order="7">Boskovic J</author>
                    <author order="8">Guallar V</author>
                    <author order="9">Errasti-Murugarren E</author>
                    <author ORCID="0000-0001-5705-0699" order="10">Llorca O</author>
                    <author order="11">Palacin M</author>
                    <title>Structural basis for substrate specificity of heteromeric transporters of neutral amino acids.</title>
                    <journal_abbreviation>Proc Natl Acad Sci U S A</journal_abbreviation>
                    <country>US</country>
                    <volume>118</volume>
                    <year>2021</year>
                    <external_references type="PUBMED">34848541</external_references>
                    <external_references type="DOI">doi:10.1073/pnas.2113573118</external_references>
                    <external_references type="ISSN">1091-6490</external_references>
                    <external_references type="CSD">0040</external_references>
                    <external_references type="ASTM">PNASA6</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <pdb_id>7b00</pdb_id>
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                    <in_frame>FULLOVERLAP</in_frame>
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    </crossreferences>
    <sample>
        <name>Human LAT2 4F2hc complex in the apo state</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Human LAT2 4F2hc complex in the apo state</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Large neutral amino acids transporter small subunit 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.058420133</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MEEGARHRNNTEKKHPGGGESDASPEAGSGGGGVALKKEIGLVSACGIIVGNIIGSGIFVSPKGVLENAGSVGLALIVWI
VTGFITVVGALCYAELGVTIPKSGGDYSYVKDIFGGLAGFLRLWIAVLVIYPTNQAVIALTFSNYVLQPLFPTCFPPESG
LRLLAAICLLLLTWVNCSSVRWATRVQDIFTAGKLLALALIIIMGIVQICKGEYFWLEPKNAFENFQEPDIGLVALAFLQ
GSFAYGGWNFLNYVTEELVDPYKNLPRAIFISIPLVTFVYVFANVAYVTAMSPQELLASNAVAVTFGEKLLGVMAWIMPI
SVALSTFGGVNGSLFTSSRLFFAGAREGHLPSVLAMIHVKRCTPIPALLFTCISTLLMLVTSDMYTLINYVGFINYLFYG
VTVAGQIVLRWKKPDIPRPIKINLLFPIIYLLFWAFLLVFSLWSEPVVCGIGLAIMLTGVPVYFLGVYWQHKPKCFSDFI
ELLTLVSQKMCVVVYPEVERGSGTEEANEDMEEQQQPMYQPTPTKDKDVAGQPQP</string>
                    <external_references type="UNIPROTKB">Q9UHI5</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Isoform 2 of 4F2 cell-surface antigen heavy chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.058003651999999996</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSQDTEVDMKEVELNELEPEKQPMNAASGAAMSLAGAEKNGLVKIKVAEDEAEAAAAAKFTGLSKEELLKVAGSPGWVRT
RWALLLLFWLGWLGMLAGAVVIIVRAPRCRELPAQKWWHTGALYRIGDLQAFQGHGAGNLAGLKGRLDYLSSLKVKGLVL
GPIHKNQKDDVAQTDLLQIDPNFGSKEDFDSLLQSAKKKSIRVILDLTPNYRGENSWFSTQVDTVATKVKDALEFWLQAG
VDGFQVRDIENLKDASSFLAEWQNITKGFSEDRLLIAGTNSSDLQQILSLLESNKDLLLTSSYLSDSGSTGEHTKSLVTQ
YLNATGNRWCSWSLSQARLLTSFLPAQLLRLYQLMLFTLPGTPVFSYGDEIGLDAAALPGQPMEAPVMLWDESSFPDIPG
AVSANMTVKGQSEDPGSLLSLFRRLSDQRSKERSLLHGDFHAFSAGPGLFSYIRHWDQNERFLVVLNFGDVGLSAGLQAS
DLPASASLPAKADLLLSTQPGREEGSPLELERLKLEPHEGLLLRFPYAA</string>
                    <external_references type="UNIPROTKB">P08195</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="4">
                <name>Digitonin</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0012293119999999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>AJP</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                    <concentration units="mg/mL">1.5</concentration>
                    <buffer>
                        <ph>7.0</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil R0.6/1</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">297</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <number_grids_imaged>1</number_grids_imaged>
                            <average_electron_dose_per_image units="e/Å^2">1.0</average_electron_dose_per_image>
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                <image_recording_id>1</image_recording_id>
                <ctf_correction>
                    <type>NONE</type>
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                    <resolution units="Å" res_type="BY AUTHOR">3.98</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                    <details>CTF refinement in cisTEM</details>
                    <number_images_used>176132</number_images_used>
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                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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                            <version>3.1</version>
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